Grinding machinery



L. F. NENNINGER GRINDING MACHINERY May 28, 1935.

Filed May 5, 1933 4 Sheets-Sheet y 1935. L. F. NENNINGER I 2,002,921

GRINDING MACHINERY May 1935. L. F. NENNINGER 2,002,921

GRINDING MACHINERY if W 7 62mm I May 28, 1935. F. NENNINGER 2,002,921

GRINDING MACHINERY Filed May 3, 1933 4 Sheets-Sheet 4 lulu n. 1'

, v E v 4 v I, l l ll la '14; /47

.15 w Wilfl Patented May '28, 1935 UNITED STATES- PATE NToFFICE I This invention relates to improvements in grinding machines and especially to improve ments in such machines which have an oscillablymounted grinding wheel head. U

An object of the invention is the provision of :improved means for efiecting and controlling :the oscillation of the said head. i 7

Another object of the invention is the provision of improved compensating and adjusting mechanism utilizable with oscillating head type of grinding machines whereby the said head may be more correctly and readily'controlled.

A further object of the invention is the provision of a machine as above specified, having par- ,ticular application for grinding large rolls and in which the said .controlling and adjusting mechanism are conveniently disposed with respect to the operator's position or station.

A still further object of this invention is the provision of improved means for effecting an accurate and sensitive adjustment of the grinding wheel and work relative to one another, forexample about the axis of oscillation of the head, whereby minute adjustment may be made to compensate, for example, for wheel wear, as well as for effecting extremely light cleanup or finishing cuts. l

Other objects and advantages of the present invention should be readily'apparent by reference to the following'specification considered in conjunction with the accompanying drawings forming a part thereof, and it is to be understood that any modifications may be made in the exact structural details there shown and described within the scope of .the appended claims without departing from or exceeding the spirit of the invention.

In the drawings: a r

Figure 1 is a front elevation of 'a grinding machine embodying the improvements of this invention. V 1

Figure12 is a top plan view of the machine 'illustratedin Figure 1. i

Figure 3 is a transverse sectional view through the machine as seen from line 3-3 .on Figure 1.

Figure 4 is an elevational view of the grinding wheel traversing mechanism, as seen forexampie from line 4-4 on Figure 2.

Figure 5 is a vertical sectional view through the grinding wheel traversing mechanism taken ina plane behind the plane of Figure 4,-

Figure 6 is a fragmentary view, partly in elevation and partly in section, as seen, for exampie, from line 6--6 on Figure 5.

Figure 7 is a fragmentary sectional and eleva ing dogs 22.

.tion'al view illustrating the mechanism for effecting the oscillation of the grinding wheel head as seen, ,forexample on line 11 on Figure '3,

Figure 8 is a sectional view taken outlined-8 of. Figure 3.

Throughout the several views of the drawings similar reference characters are employed to indioate the sameorsimilar parts. i I

As was abovenotedthis invention pertains to improved mechanism for adjusting and efiecting thelposition and oscillation of an oscillatory type elf-grinding wheel head. Themechanism is illustrated in the drawings as being utilized with roll grinders for the larger types of rolls, but it is to be understood that it has equal application to other types of grinding machines or machine tools enerally, whether employed for finishing mill rolls or not. In general the machine comprises a edto be axially shifted tov effect a relative ,tra-

This invention has particular reference to the mechanism inoluded'in the mechanism for effecting the oscillationof the wheelahd particularly to means for adjustingthis means.

The machine 7 specifically illustrated the drawings comprises a bed I5 mounted on a concrete foundation it, here shown as what might be termedan island. The foundation l6 is entirely surrounded by a channel l1, containing the cool- .ant to be supplied to the work and wheel during .the grinding oper-ationas is'usual in grinding practice. The channel I! terminates on one side atthe level'of-the floor and on the other side at the level of the foundation which is disposed belowv the Themachine bed 1s provided on oneend'with a supporting surface 18 on which isdisposed the workdriver or headstock [9. The headstock 19 has projectingtherefrom the center 20, which is surrounded by a faceplate 2|, carrying the driv- Any suitable or desirable means maybe employed for rotating the face plate 2| and dogs 22, but as here shown this'mechanism comprises an electric motor or-prime mover. 23

coupled through the coupling 24 with .a driving shaft 25 assoeiatedwith the headstock IS.

ts other end is provided with guideways 26 and 21,

. 26 and 21 for movement there along is a tailstock gear 41.

the former being a flat way, while the latter is of the inverted V type. Mounted on the guide ways 28, from which projects the center 29 in axial alignment with the headstock center 20, and together roughly positioning the work on the bed. The work 38 is shown in Figures 1 and 2 in phantom lines, from opposite ends of which project journal bearings 3| and 32. These bearings are respectiveley supported by journal rests 33 and 34, which determine the axis about which the roll,

is to be rotated as is the usual practice with machines of this type.

I The bed I5 is providedwitha rearward extension on which is formed throughout its length a pair of flat and v guideway's' 38 and 31. Mounted on the guideways 38 and 31 for movement there along is a bed plate 38, which supports a slide 39 for'the grinding wheel carriage 48. The bed plate 38 in addition supports the mechanism for effecting the translation thereof, as well as providing the operator's station. For this latter purpose the bed'plate has extending upwardly therefrom a pedestal 4| for the operatorsseat 42.. Within reach of the operators seat 42 is the mechanism, as will later bedescribedfor controlling all of the movements of the several units of the machine.

The mechanismfor traversing the bed plate 38 and parts carried thereby is best illustrated in Figures 4; 5, and 6, and as there shown, comprises a housing 43 to which is exteriorly secured a shelf 44 supporting-an electric motor or prime mover 45. The shaft 48 of the motor 45 projects interiorly of the housing 43 and is rotatively journaled in bearings'provided thereby. Loosely mounted on theshaft 48 is a spur gear 41 and bevelgear 48.

Splined to the shaft between these gears is a clutch member 49, having provided on one face clutch teeth 58 for engagement with complementary clutch teeth 51 on the adjacent face of the 'spur The clutch member 49 is provided on its other side with clutch'teeth- 52 adapted to engage with complementary clutch teeth 53 on the adjacent face of the bevel gear 48. From this it will be seen that depending upon the position of the clutch member 49. either the spur or bevel gear will be connected with the shaft. In order to' effectthe'adjustment or shifting of the clutch 'member it is provided with a circumferential groove 54, receiving'the forked end of a shifter lever 55 keyed or otherwise secured to a shaft 56 that projects beyond one face of the housing 43.

, gears may be independent gears-keyed to one another'for simultaneous rotation or maybe integral as illustrated in Figured, The spur gear 59, see Figure 6, meshes with a gear 6| keyed or otherwise secured to a shaft 62, rotatively journaled in the walls of housing 43. Thisshaft 62 has keyed to its other enda second gear 63 which meshes with the spur gear 47, loosely journaled on the motor shaft 46. From this it will be seen that depending upon the position of the clutch member 49'either the bevel gear 48 will be driven direct or the bevel gear 68 will be rotated through the transmission'line, including the gears 41, 63, GI and 59. 1 i

This mechanism, constitutes a reversing mechanism since the gear 48 will be driven in the opposite direction from that of the gear 60. The bevel gears 48 and 68 are at all times in mesh with a large bevel gear 64, loosely journaled on a driving shaft 65. In order to be clutched or keyed to this shaft the bevel gear 64 is provided with clutch teeth 86 adapted to be engaged by clutch teeth 61 on one side of clutch member 68. The clutch member 68 is provided with a circumferential groove 69', receiving the forked end 18 of a clutch shifter lever H, keyed or otherwise secured to a shaft (2 journaled in the housing 43 and projecting beyond the face thereof. The projecting end of the shaft 12 carries a manually actuable lever 13 whereby the clutchis shifted into and out of engagement with the bevel gear 64.

clutch teeth 15 formed on the adjacent" face of a worm wheel 16 loosely journaled on the shaft 85. Meshing with the worm wheel 18 is a worm l1 integral with'or secured to a worm shaft 18,

journaled in the walls of the housing 43 and projecting beyond the forward face thereof. Keyed or otherwise secured to this extending portion of the Worm shaft 18' is a hand wheel 19 whereby the said shaft and consequently the worm are manually rotated. From this will be seen that the shaft 65 may be manually actuated in reverse directions.

in axial alignment with the'drive shaft 65 and journaled in the bed plate 38 is a driven shaft 88, vcarryingcn its lower end a .rack pinion or gear 8| meshing with the teeth of rack bar 82 secured to the bed extension 35 and shown in Figure 5 as secured to the inner longitudinal edge of the V guide way 31 formed thereon. It is the shaft 88 that is power driven through the above described power drive reversing mechanism and themanual drive operable on the driving shaft 65. This shaft therefore is adapted to be connected with the drive shaft 85 for effecting the rotation of the shaft 80. As illustrated in the drawings the shafts 65 and 88 may be directly coupled for driving the drivenshaft'at a high speed or indirectly coupled for driving the said shaft at a low speed.

This mechanism comprises a clutch member 83 .splined on the shaft 88 and being provided on opposite sides thereof with clutch teeth 84' and 85. The clutch 83 is provided with a circumferential groove 86 receiving the forked end 81 of clutch shifter lever 88, keyed or otherwise secured to a shaft 89 journaled in and projecting beyond the housing 43. To the projecting end of the shaft 89 is secured a lever 98 whereby the said shaft is oscillated for correspondingly oscillating" the clutch lever 88 and shifting the clutch member 83. I

For effecting a direct coupling between the driving shaft 85 and the driven shaft 88 the couple the said shafts the clutch teeth 85 are adapted to engage with complementary clutch teeth 93 formed on a large gear 94 keyed near the upper end of the driven shaft 80. Meshing with the gear' 94 is a pinion 95 keyedto the lower end of an intermediate shaft 96 rotatively journaled in a boss or lug 91 projecting inwardly from one wall of the housing 43. The shaft: 96 extends. entirely through the said boss or lug 9! and has keyed to its upper end a second gear 98 which meshes with the gear on the driving shaft 65. From this it will be seen that the shaft 80 isrotated at one speed, by being directly'coupled with the driving shaft 65, and at a different speed through the gear train, including the gears 98, 95 and 94,, and that the bed plate 38 :and parts carried thereby are correspondingly traversed relative .to the guiding ways on the bed extension 35. i

As was above noted, the bed plate 38 has mounted thereon a slide 39 whichzsupports the The slide 39 is grindingwheel carriage 40. adapted to be actuated relative to the bed plate 38 toward and from the work for which purpose it is provided with a lug 99in which is secured a nut I00, having threads adapted to mesh with the threads of a cross feed screw IOI The screw IN is mounted forrrotation but not axial adjustment in ,abracket I02, secured :to the rear end of the bed plate 38. .In order to'rotate'the screw IOI. it .has. keyed or otherwise'secured to it a worm wheel I03 having meshed-therewith a worm I04 on the .end oflaworm shaft I05. The worm shaft I05 is connected in. any desirable manner with the motor shaft of an electric motor or prime mover I06, see FigureZ, mounted on the bed plate 38 to one side of the slide. From this it will be seen thatthe grinding wheel carriage, together with the slide andparts carried thereby, may be adjusted towardand from the work. j

The slide 39 is provided at its forward end with a trunnion *bearing I01 in which is rotatively mounted a trunnion shaft I08 whichis carried by depending lugs I09 carried by the grinding wheel carriage 40 and whereby the said carriage is oscillatably mounted for movement toward and from the work. The carriage. 40 provides suitable bearings H0 in which is journaled a spindle III having secured to its one end a grinding wheel H2. The grinding wheel I I2 is partially enclosed by a hood or guard I I 3 for confining the coolant usual with grinding machines. Mounted on the upper surface of the carriage 40 is an electric motor or prime mover II 4 connected by a suitable transmission enclosed within the guard H5, see Figure 2, with the grinding wheel spindle II I whereby the said spindle and grinding wheel are rotated at the usual high or grinding rate of speed.

In order to effect the oscillation of the slide 39, carriage 40 and grinding wheel II2 toward and from the work the .bed extension 35 has secured to its rear surface a'cambering .mechanism comprising a supplementary bed or support H6. The supplementary bed or support H6 is formed in its upper surface with a guide way II! in which is mounted for movement relative thereto a carriage II8, supporting a .cambering bar H9. The carriage H8 is provided on its under surface with a rack bar I I9. having its teeth meshing with a rack pinion I20 integral pins. desired form clamp screws I29 areemployedto.

cambering' bar "H9 is mounted in away I22 formed longitudinally in the upper surface "of .the carriage II 8 :and is supported in said-way by pins I23 and I24. Formed along onesurface of the cambering bar II 9 is a lug I 25' adapted the bar I I9 takes place in a downward direction about the pins I 23 and I24, and in an upward direction about the pins I26 and I2'I. I Any "suitable means may be employed for effecting thisbendingof the bar, use in the present instance being'made of bending screws .1I28 disposed in the carriage intermediate the fbending After the bar has been adjusted to the lock same in position. I l a a By reference to Figures 1 and 2 it will be noted that the ends of the rolls are provided with bevels I30"which are formed by means of adjustable cam members I3I and I32secured *to the carriage II 8 for movement therewith. These cam members I3I and I32 areadjustablerelative to the cambering bar I I9 and may be positioned at any desired point with respect thereto, depending upon the desired contour to be provided on the Work. a

Riding on'theupper'surface I33 of the bar H9 is a roller I34rotative1y carried by=an arm I35 keyed or otherwise secured to the outer end of a spline shaft I36 rotatively journaled in a bearing I37 secured to the rear end. of the bed plate 38. The spine shaft I36 is disposed in bushings I38 journaled for oscillation in lugs I39, depending from the underside of the slide 39, and

has splined thereto, between the lugs I39, to'

partake of the oscillatory movement of the shaft, a finger or arm I40. The outer end of the arm I40 contacts with the lower end of a screw or plunger I4I associated with the carriage 40. The

screw or plunger member I4I constitutes the coupling between the carriage 40and the mechanism operable by the cambering bar II9 where by the carriage 40 is oscillated in accordance with the contour of-the barI I9.

.In order. to take up for inevitable wear on .the grinding wheel H2 and to compensate for the removal of material from the wheel, as by true-f ing, the,carriage 40 is adapted to be independently adjusted about the trunnion I08. For this purpose the screw I4I is threaded into a nut I421rotatively journaled in a lug I43, forming a part'of the carriage 40 and supported, for example, by a web I44 integral with the carriage.

The nut I42 has secured to it or formed integral therewith a worm wheel I45 in mesh with a worm I46 on a worm shaft I41. The worm shaft I48 projects beyond the wallaof the carriage 40.to receive a hand wheel I40 whe eby the said worm is rotated. V P

"From theforegoing it will be noted that the carriage40 and grinding wheel I I2'carried thereby' are actuatedabout the axis of the trunnion motor 23, the wheel, rotating motor the operator. rising therefrom a bracket or standard! havand 89 projecting therefrom on the s'ideadjacent the. operators station or seat 1 42. it will also benoted that the hand wheel 19 projectingfrom this housing isalso disposed ,on the operators side of the housing so that the said levers and hand Wheel .are within reach without requiring the operator to leave his station. It will further benoted that the hand wheel M8 for the grinding wheel slide adjusting and compensating mechanism projectsfrom the-side of. carriage 40 which is also adjacent the operators ment thereof. 7

The several motors, such as the work driving I the grinding wheel traversing motor 45 and the slide adjusting motor I06 are disposed at points re;- motefrom the operators station which might cause him to leave hisposition to effect their operation. In order to avoid this, howeventhe switchpanel or control mechanism is mounted on the bed plate 38 within convenient reach of For this purpose the bed plate has .station whereby he can readily control the moveing secured to it on the-side adjacent, the operatorsseat 42 a switchboard or panel I50 carrying a plurality of controljswitches. ll. From this it will be seenthat anyone of the several motors may be controlled from the operators station,

the same as the'adjustment and control of the traversing mechanism for the grinding wheel mechanism, 7

It is believed that the operation of this machine will be readily understood and that means are provided for manually oscillating the grindingwheel toward andfrom the work, means are provided to compensate for wear and removal of material from the grinding wheel to insure proper engagement between the wheeland the work and that the machine is at all times under the immediate control of the operator while he is in the most advantageous position for observ ing the action of the wheel on the work.

What is claimed is;

1. In a grinding machine of the class described the combination of a bed, a grinding wheel support mounted thereon for a translation relative thereto, a slide onthe support for transverse adjustment relative thereto, a grinding wheel carriage pivotally mounted on. the slide for oscillation in the direction of adjustment; of the slide, power means Efor actuating the slide,,

manual means for, oscillatably adjusting the carriage, additional power means for oscillating the carriage, a coupling between the power oscillating means and carriage whereby the power oscillating means is effective regardlessof the adjustment of'the slide, with respect to the support, including a spline shaft adapted to be 05- cillated' by the power oscillating means, an arm inoperative engagement with the spline shaft and shiftable relative thereto with the slide, and an axially adjustable plunger contacting with the arm and forming a part of the manual oscillating' means. 7

2. In a grinding machine of the class described the combination of a bed, a grinding wheel support mounted thereon for a translation relative thereto, a slide on the support for transverse adjustment relative thereto, a grindingv wheel carriage pivotally mountedon the slide for oscillation in the direction of adjustment of the slide, power means for actuating the slide,

'manual means for oscillatably adjusting the carriage, additional power means for oscillating the ingmeans and carriage whereby the power os cillating means is efiective regardless of the ad-- justment of the slide with respect to the support, includinga spline shaft-adapted to be oscillated by the power oscillating means, an arm in operative engagement with the spline shaft and shiftable relative thereto with the slide, an axially adjustable plunger contacting with the arm and forminga part. of the manual oscillating means, and means adjusting the position of the power carriage oscillating means with-respect to wheel support.

3. In agrinding machine the combination of a bed, means on the bed for supporting a work piece for rotation about a predetermined axis, a grinding wheel assemblyfsupported by said bed and including a slide adapted to be translated on the bed axially of the work, a second slide on the first slide for movement transversely thereof toward and from the work axis, a grinding wheel carriage pivotally, connected to the second slide to partake of .the transverse movements thereof, a mechanism including. inter-engaged nut and screw elements for effecting an oscillation of the carriage about its pivotal connection wherein one of thesaid elements is rotatably supported bythe carriage whilev the other is held against rotative movement but has a sliding connection therewith,fand manually operable means connected with said rotatable element and terminating in a hand wheel- ,ior efiecting the rotation screw elements for effecting an oscillation of the carriage about its pivotal connection wherein one of the said-elements is rotatably supported by the. carriage while the other is'held against rotative movement. but has a. sliding connection therewith, manually operable means'connected with said rotatable element and terminating in a hand wheel for effecting the rotation thereof, and additional meansfor effecting an oscillation of the. carriage independent of the oscillation imparted thereto by the screw and nut mechanism and effective. duringthe translation of the grinding wheel. unit.

.5. In a grinding machine the combination of a bed, means onithe bed for supporting a work piece for rotation about a predetermined axis, a grinding wheel assembly supported by said bed and including a'slide adapted to be translated on the bed axially of the work, a second slide on the first slide for movement transversely thereof toward and from the work axis, a grinding wheel carriage pivotally connected to the second slide to partake of the'transverse movements thereof,

a mechanism including inter-engaged nut. and screw elements for effecting an'oscillation of the carriage about its pivotal connection wherein one of the said elements is rotatably supported by the carriage while the other is held against rota- 2,002,921 1 cambering mechanism operable during the transbed, means on the bed for supporting a work,

piece for rotation about a predetermined axis, a grinding wheel assembly supported bysaid bed and including a slide adapted to be-translated on the bed axially of the work, asecond slideon the first slide for movement transversely thereof toward and from the work axis, a grinding wheel carriage pivotally connected to the second slide to partake of the transverse movements thereof,

a mechanism including inter-engaged nut and screw elements foreffecting an oscillation of the carriage about its pivotal connection wherein one of the said elements is rotatably supported by the carriage while the other is held against -rota-' tive movement but has a sliding connection there with, manually operable means connected with said rotatable element and terminating in a hand wheel for effecting the rotation thereof, a cambering mechanism operable duringthe translation of the grinding wheel unit operable through the screw and nut mechanism foreifecting the os-- cillation of the carriage independent of said oscillation as imparted thereto bythe manual;

means, including an oscillatable shaft having an angular cross section adapted to be oscillated by the cambering mechanism, anda member slidably mounted on said shaft to partake of the oscillations thereof and forming a thrust member for the rotatable part of the screw and nut mechanism.

' 7. In a grinding machine the combination of a bed, means on the bed for supporting a work piece for rotation about a predetermined axis, a grinding wheel assembly supported by saidbed and including a slide adapted to be translated on the bed axially of the work, a second slide on the first slide for movement transversely thereof toward and from the work axis, a grinding wheel cars riage pivotally connected to the second slide to partake ofthe transverse movements thereof, a mechanism including inter-engaged nut and screw elements for eilectingan oscillation of the carriage aboutits pivotal connection wherein one of the said elements is rotatably supported by the carriage while the other is held against rotative movement but has a sliding connectiontherewith, manually operable means connected with said rotatable element and terminating in a hand wheel for effecting the rotation thereof, a-cambering mechanism operable during the translation of the grinding wheel unit operablethrough the screw and nut mechanism for effecting the oscillation of the carriage independent of said oscillation as imparted thereto by the manual means, including an oscillatable shaft having an angular cross section adapted to be oscillated by the cambering mechanism, a member slidably mounted on said shaft to partake of the oscillations thereof and forming a thrust member for the rotat'able part of the screw and nut mechanism, and means connecting the shaft member with the transversely shiftable slide whereby the cambering mechanism effects the oscillation of the carriage grinding wheel carriage at a 8. A grinding 'machine of the character described, including a bed, a slide supported by the bed forv transverse movement with respect thereto, a grinding wheel carriage pivotally connected to the forward portion of said slide and supporting a} grinding wheel adjacent the point of pivot-- ance thereof, and a driving'motor for the grinding wheel at a point remote from said pivot, a

plunger member adjustably' supported by the "regardless of the transverse position of the sec: ond slide. a

point adjacent the 1 motor, and depending through the slide, a cam- V bering device carried by the bed and terminating 15 in a spline shaft extending parallel with thedi rection of movement of the slide, spaced means on the slide providing bearings for said shaft, an

abutment member mounted on the shaft between said spaced means'whereby said memberis trans lated with the slide relativeto the spline shaft, said member having a portion for engagement with the plunger of the grinding wheel carriage wherebyfthe cambering mechanism will correspondingly react through the plunger against the carriage in any transversely adjusted position of l the slide, and operating mechanism inter-engaged with the plunger for effecting a longitudinal ad justment thereof with respect to its supporting carriage,jwhereb-y the efiective zone of movement of the grinding wheel under influence of the camberingmechanism may be shifted as" desired.

9. A machine for the grinding of large rolls or the like including a bed unit, roll supporting means carried thereby, amain slide supported for Iongitudinal 'movement relative to the bed, a sup- 7 plemental slide carried by the main slide and movable transversely of the bed in a direction toward and from the work supporting means, a

grinding wheel'carriage pivotally secured to the inner portion of the second slide, a grinding wheel rotatably supported by the carriage, and means for determining the effective relation between the grinding wheel and a work piece when in position in the machine, said means including-a cambering bar carried by the bed, a transversely extending spline shaft ournaled in the longitudinally movable slide, means interconnecting the shaft and bar for effecting an oscillation of the shaft, the transverse slide having spaced bearings slidably engaging the shaft, an actuating abutment splined on the shaft and disposed between said spaced bearings whereby said abutment may oscillate with the shaft but will be translated relative thereto on transverse movement of the second slide, a plunger member slidably but non-rotate gaging the abutment and having an intermediate non-translatably secured to the carriage andcircumscribing the threaded portion of the plunger,

and means for eifecting a rotation of said nut about the threaded portion of the plunger whereby a longitudinal movementof the plunger with respect to the carriage will be efiected definitely to vary the angular relationship of the carriage and slide supplementing the variants effected by. reaction of the cambering bar on the plunger enthreaded portion, a nutmember rotatably' but Q 55 ably inter-engagedwith the, grinding wheel car-- i riage, said plunger having a terminal portion en- 

